19408729103 has 2 divisors, whose sum is σ = 19408729104. Its totient is φ = 19408729102.

The previous prime is 19408729091. The next prime is 19408729163. The reversal of 19408729103 is 30192780491.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19408729103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19408729163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9704364551 + 9704364552.

It is an arithmetic number, because the mean of its divisors is an integer number (9704364552).

Almost surely, 2^19408729103 is an apocalyptic number.

19408729103 is a deficient number, since it is larger than the sum of its proper divisors (1).

19408729103 is an equidigital number, since it uses as much as digits as its factorization.

19408729103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 19408729103 in words is "nineteen billion, four hundred eight million, seven hundred twenty-nine thousand, one hundred three".